HRS §486-52.5
Gas pumps must show price per gallon
The state must make rules requiring gas stations that price by the liter to also show the price per gallon on each pump and in ads, in numbers as big as other prices. If a station prices by the gallon, it does not need to show liter prices. This does not force stations to sell by the gallon.
businesses
The statute, as written — Price posting by gallon required
The director shall adopt rules to require any retail dispenser of gasoline, whose variator price is set in liters, for every grade of gasoline sold, to post on top or on the face panel of each gasoline pump and on any other pricing advertisement in conspicuous numbers comparable in size to any other posted price, the price per United States gallon for the gasoline dispensed. If the variator price is set in gallons, no liter price posting or advertisement shall be required. Nothing in this section shall be deemed to require that gasoline be sold by the gallon.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.